What is a colonscopy?

A colonoscopy is a test that is used to detect abnormalities in the large intestine and rectum, including polyps, rectal bleeding and cancer. The procedure is done using a long, flexible tube with a tiny video camera attached that allows the doctor to view the inside of these areas. If necessary, polyps or other types of abnormal tissue can be removed through the scope. Patients with no personal or family history of colon cancer should have a screening colonoscopy every 10 years after age 50.